<template>
	<view>
		<!-- <my-search :bgColor="'black'" :bdRadius="10"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧滚动视区 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<!-- :class="{active:active ===index}" -->
					<view :class="['left-scroll-view-item',index === active ? 'active' : '']" @click="activeChange(index)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<!-- 右侧滚动视区 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop" class="right-scroll-view">
				<view v-for="(item,index) in cateLeve2" :key="index">
					<view class="cate-v2-title">
						/ {{item.cat_name}} /
					</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,index) in item.children" :key="index"
							@click="gotoGoodsList(item3)">
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 屏幕可使用的高度
				wh: 0,
				// 分类数据列表
				cateList: [],
				// 选中的索引,
				active: 0,
				// 二级分类列表
				cateLeve2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			// 获取屏幕的可使用高度
			const syncInfo = uni.getWindowInfo()
			this.wh = syncInfo.windowHeight - 50
			this.getCateList()
		},
		methods: {
			/* 
			 获取分类数据列表
			 */
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message || []
				this.cateLeve2 = res.message[0].children || []
			},
			/* 
			 动态选中索引
			 */
			activeChange(i) {
				this.active = i
				this.cateLeve2 = this.cateList[i].children || []
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			/* 
			 跳转到商品列表页面
			 */
			gotoGoodsList(item) {
				// 编程式导航跳转
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			/* 
			 跳转到搜索页
			 */
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #F7F7F7;
				text-align: center;
				line-height: 60px;
				font-size: 12px;

				&.active {
					background-color: #FFFFFF;
					position: relative;

					&:before {
						content: ' ';
						width: 3px;
						height: 30px;
						display: block;
						background-color: #c00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}

		.right-scroll-view {

			.cate-v2-title {
				font-size: 12px;
				font-weight: bold;
				text-align: center;
				padding: 15px 0;
			}

			.cate-lv3-list {
				display: flex;
				flex-wrap: wrap;

				.cate-lv3-item {
					width: 33.33%;
					display: flex;
					flex-direction: column;
					justify-content: center;
					align-items: center;
					margin-bottom: 10px;

					image {
						width: 60px;
						height: 60px;
					}

					text {
						font-size: 12px;
					}
				}
			}
		}


	}
</style>